// 📦 引入工具库
const _ = require("lodash");
const path = require("path");
const fs = require("fs");

// 📦 ESM 支持模块加载
const esm = require("esm");
const requireModule = esm(module);

// 📦 项目依赖模块
const { readAllValues } = requireModule(
  "../../../awakened-potential/helpers/readAllValues.js"
);
const checkAccuracy = requireModule("../../utils/checkAccuracy.js");

// ✅ 读取历史开奖数据（模拟全部）
const allValues = readAllValues("m");

// ✅ 号码池（01 ~ 49）
const allNumbers = Array.from({ length: 49 }, (_, i) =>
  (i + 1).toString().padStart(2, "0")
);

// ✅ 是否使用窗口
const useWindow = true;
// ✅ 窗口大小
const windowSize = 5;
// ✅ 存储预测结果
const predictResults = [];
let correct = 0;
let maxWrongStreak = 0;
let currentWrongStreak = 0;

/**
 * 将时间字符串转为星期几
 * @param {string} dateStr - '2025-01-01'
 * @returns {number} - 0 (周日) ~ 6 (周六)
 */
function getWeekday(dateStr) {
  const d = new Date(dateStr);
  return d.getDay(); // 0~6
}

/**
 * 选择 32 个最活跃的号码（在该星期中）
 */
function select32ByWeekdayFrequency(temp, weekday) {
  const freqMap = {}; // 某个星期中每个号码出现次数

  temp.forEach((item) => {
    const w = getWeekday(item.time);
    if (w === weekday) {
      const num = item.number;
      freqMap[num] = (freqMap[num] || 0) + 1;
    }
  });

  const scored = allNumbers.map((num) => ({
    number: num,
    score: freqMap[num] || 0,
  }));

  // 按得分从高到低取前 32 个
  const top32 = _.orderBy(scored, ["score", "number"], ["desc", "asc"])
    .slice(0, 32)
    .map((x) => x.number);

  if (top32.length !== 32) {
    throw new Error(`❗ 无法生成 32 个不重复号码（当前 ${top32.length} 个）`);
  }

  return top32;
}

// ✅ 主循环
allValues.forEach((item, index) => {
  const temp = useWindow
    ? allValues.slice(Math.max(0, index - windowSize), index)
    : allValues.slice(0, index);

  if (temp.length === 0) return;

  // 当前期的星期几
  const weekday = getWeekday(item.time);

  const selectedNumbers = select32ByWeekdayFrequency(temp, weekday);

  if (selectedNumbers.length !== 32) {
    throw new Error("选出的32个号码数量不正确");
  }

  try {
    const isHit = checkAccuracy(selectedNumbers, item.number);
    if (isHit) {
      correct += 1;
      currentWrongStreak = 0;
    } else {
      currentWrongStreak += 1;
      maxWrongStreak = Math.max(maxWrongStreak, currentWrongStreak);
    }
    predictResults.push(selectedNumbers);
  } catch (err) {
    console.error(`❌ checkAccuracy error at index ${index}: ${err.message}`);
  }
});

// ✅ 输出统计结果
const total = predictResults.length;
const accuracy = total > 0 ? ((correct / total) * 100).toFixed(2) : 0;

console.log(`预测总数: ${total}`);
console.log(`命中次数: ${correct}`);
console.log(`准确率: ${accuracy}%`);
console.log(`最大连续错误次数: ${maxWrongStreak}`);
